| Barnes' Notes on the Bible I desired Titus - To go and complete the collection which you had commenced; see 2 Corinthians 8:6. And with him I sent a brother - see note on 2 Corinthians 8:18. Did Titus make a gain of you - They knew that he did not. They had received him kindly, treated him with affection, and sent him away with every proof of confidence and respect; see 2 Corinthians 7:7. How then could they now pretend that he had defrauded them? Walked we not in the same spirit? - Did not all his actions resemble mine? Was there not the same proof of honesty, sincerity, and love which I have ever manifested? This is a very delicate turn. Paul's course of life when with them they admitted was free from guile and from any attempt to get money by improper means. They charged him only with attempting it by means of others. He now boldly appeals to them and asks whether Titus and he had not in fact acted in the same manner; and whether they had not alike evinced a spirit free from covetousness and deceit?
Clarke's Commentary on the BibleI desired Titus - I never sent any to you but Titus and another brother; 2 Corinthians 8:6, 2 Corinthians 8:18. And did Titus make a gain of you? Did he get any thing from you, either for himself or for me? You know he did not. He was actuated by the same spirit, and he walked in the same steps.
Gill's Exposition of the Entire BibleI desired Titus, and with him I sent a brother,.... The apostle proceeds to mention one or two persons that he had sent unto them, and desires to know whether they could charge them with any such practices. He had desired, exhorted, and encouraged Titus to go unto them, and collect money from them; but not for either of themselves, but for the poor saints at Jerusalem; and he sent another brother along with him, who is by some supposed to be Luke, to be a companion of him, and an assistant to him; and who was a witness of what he did, and for what purpose he was sent, and how he behaved: did Titus make a gain of you? did he greedily desire your substance? did he show an avaricious temper, or a covetous inclination after your money? did he by any methods extort it from you? say if Titus, or the brother with him, received anything from you, either on their own, or my account? walked we not in the same Spirit? in the same Spirit of God, being directed and influenced by him; or in the same disposition of mind, being agreed and determined to preach the Gospel freely, and receive nothing for it: walked we not in the same steps? took the same methods, lived the same course of life, working with their own hands to supply their wants, rather than be burdensome to others: the apostle suggests, that where are the same Spirit, temper, disposition, and principles, there will be the same works and actions; and as for covetousness, it is neither agreeable to the Spirit of God, nor to the spirit of a Christian.
Geneva Study BibleI desired Titus, and with him I sent a brother. Did Titus make a gain of you? walked we not in the same spirit? walked we not in the same steps?
People's New Testament 12:18 I desired Titus. He sent Titus and another brother, but they asked no gain.
Wesley's Notes 12:18 I desired Titus - To go to you.
Jamieson-Fausset-Brown Bible Commentary18. I desired Titus-namely, to go unto you. Not the mission mentioned 2Co 8:6, 17, 22; but a mission previous to this Epistle, probably that from which he had just returned announcing to Paul their penitence (2Co 7:6-16). a brother-rather "OUR (literally, 'the') brother"; one well known to the Corinthians, and perhaps a Corinthian; probably one of the two mentioned in 2Co 8:18, 22. same spirit-inwardly. steps-outwardly.
Matthew Henry's Concise Commentary12:11-21 We owe it to good men, to stand up in the defence of their reputation; and we are under special obligations to those from whom we have received benefit, especially spiritual benefit, to own them as instruments in God's hand of good to us. Here is an account of the apostle's behaviour and kind intentions; in which see the character of a faithful minister of the gospel. This was his great aim and design, to do good. Here are noticed several sins commonly found among professors of religion. Falls and misdeeds are humbling to a minister; and God sometimes takes this way to humble those who might be tempted to be lifted up. These vast verses show to what excesses the false teachers had drawn aside their deluded followers. How grievous it is that such evils should be found among professors of the gospel! Yet thus it is, and has been too often, and it was so even in the days of the apostles. | 
